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Researchers aim to get a sample that is
representative of the target population
Every type of person in the TP should be
proportionally represented in the sample
NB: it is not necessary for the sample to be
representative of the GP unless the researcher
intends to generalise…read more

Slide 3

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Opportunity sampling
Use whoever is immediately available e.g. go out
and accost passers-by
Volunteer sampling
Use whoever puts themselves forward e.g.
advertise in the paper…read more

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Quota sampling
Design a sample to reflect the TP and then recruit
to order
Random sampling
Every member of the target population has an
equal chance of being selected
E.g. selected by computer from the electoral roll…read more

Slide 5

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How difficult to obtain
How likely to be representative…read more


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